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  3. Basement domains of the conterminous US and Alaska
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Chugach

Basement domain in the Alaska

Geologic information

Region Alaska
Crust
Formation age: 75-0 Ma
Accretion
Type: Underthrusting
Age: 75-0 Ma
Notes Forearc fragment, Peninsula arc

Geographic extent

Aleutians East, Anchorage, Kenai Peninsula, Kodiak Island, Lake and Peninsula, Matanuska-Susitna, Sitka, Skagway-Hoonah-Angoon, Valdez-Cordova, Wrangell-Petersburg, Yakutat

Bibliographic references

Plafker, George, Moore, J.C., and Winkler, G.R., 1994, Geology of the southern Alaska margin: in Plafker, George, and Berg, H.C., eds., The geology of Alaska: Geological Society of America Geology of North America, v. G-1, p. 389–450.Amato, J.M., and Pavlis, T.L., 2010, Detrital zircon ages from the Chugach Terrane, southern Alaska, reveal multiple episodes of accretion and erosion in a subduction complex: Geology, v. 38, p. 459–462.von Huene, Roland, Miller, J.J., and Weinrebe, W., 2012, Subducting plate geology in three great earthquake ruptures of the western Alaska margin, Kodiak to Unimak: Geosphere, v. 8, p. 628–644.